第二个section短文章好像是将天文的Earth——Moon System % A" G/ d' _# _: ~开头。。。。。puzzle。。。 hypothesis。。。。。 Although。。。,(有问题) it is used indiscriminatedly to explain cavalier away。。。 ) o' i7 N$ K, r3 E( I
结尾, althouth it has not been confirmed by evidence......., ...............(好像是正评价)" \. y/ a' ]( w0 R ?5 J* c
就记住这么多了。。。。。。。。。。。